Instructions: Generate the answer for a given question. The question requires common knowledge of English. Make sure that the answer is in detail, long, consistent with the context, and requires general knowledge of English. To be less repetitive, please vary your language for each question. Give a proper explanation to answer, and if necessary, provide the definition of various terms. And conclude your answer if it's long. If you have used other resources (e.g., Merriam Webster's.) to answer the question, include citations in your answer. You don't need to paraphrase the context of your resources, but make sure that your answer is consistent and complete.
Input: I am developing some software where users are assigned tasks. They will see a date and time for when they were assigned to the task, but if they were later removed from the task, there will be a date and time for that also. 01/02/14 - Assigned 03/02/14 - Unassigned I'm pretty sure unassigned isn't correct. I suppose the task itself could be in a state of being unassigned, but the user wasn't 'unassigned' from it. Notes: I don't want to use the word 'removed', as I don't think it conveys the correct meaning and also sounds too harsh. I would like to avoid using a word your average person would never have heard of, as this isn't very user-friendly from a software point of view.
Output:
'revoked', 'withdrawn', 'retracted', or simply 'reassigned'